feat: additional printer attributes (#7)

src/get-default-printer/get-default-printer.spec.ts

@@ -35,6 +35,9 @@ it("returns the system default printer", async () => {
   const expected: Printer = {
     printer: "Virtual_PDF_Printer",
     description: "Virtual PDF Printer",
+    status: "idle",
+    connection: "direct",
+    alerts: "none",
   };
 
   await expect(getDefaultPrinter()).resolves.toEqual(expected);

src/get-default-printer/get-default-printer.ts

@@ -1,16 +1,13 @@
 import { Printer } from "../types";
 import execAsync from "../utils/exec-async";
-import parsePrinterDescription from "../utils/parse-printer-description";
+import parsePrinterAttribute from "../utils/parse-printer-attribute";
 
 export default async function getDefaultPrinter(): Promise<Printer | null> {
   try {
     const { stdout } = await execAsync("lpstat -d");
     const printer = getPrinterName(stdout);
     if (!printer) return null;
-    return {
-      printer,
-      description: await getPrinterDescription(printer),
-    };
+    return await getPrinterData(printer);
   } catch (error) {
     throw error;
   }
@@ -21,7 +18,13 @@ function getPrinterName(output: string): string {
   return startIndex === -1 ? "" : output.substr(startIndex + 1).trim();
 }
 
-async function getPrinterDescription(printer: string): Promise<string> {
+async function getPrinterData(printer: string): Promise<Printer> {
   const { stdout } = await execAsync(`lpstat -lp ${printer}`);
-  return parsePrinterDescription(stdout);
+  return {
+    printer,
+    status: stdout.split(/.*is\s(\w+)\..*/gm)[1],
+    description: parsePrinterAttribute(stdout, "Description"),
+    alerts: parsePrinterAttribute(stdout, "Alerts"),
+    connection: parsePrinterAttribute(stdout, "Connection"),
+  };
 }

src/get-printers/get-printers.spec.ts

@@ -41,10 +41,16 @@ it("return a list of available printers", async () => {
     {
       printer: "Virtual_PDF_Printer",
       description: "Virtual PDF Printer",
+      status: "idle",
+      connection: "direct",
+      alerts: "none",
     },
     {
       printer: "Zebra",
       description: "Zebra Printer",
+      status: "idle",
+      connection: "direct",
+      alerts: "none",
     },
   ];
 

src/get-printers/get-printers.ts

@@ -1,6 +1,6 @@
 import { Printer } from "../types";
 import execAsync from "../utils/exec-async";
-import parsePrinterDescription from "../utils/parse-printer-description";
+import parsePrinterAttribute from "../utils/parse-printer-attribute";
 
 export default async function getPrinters(): Promise<Printer[]> {
   try {
@@ -14,7 +14,10 @@ export default async function getPrinters(): Promise<Printer[]> {
       .filter((line: string) => line.trim().length)
       .map((line: string) => ({
         printer: line.substr(0, line.indexOf(" ")),
-        description: parsePrinterDescription(line),
+        status: line.split(/.*is\s(\w+)\..*/gm)[1],
+        description: parsePrinterAttribute(line, "Description"),
+        alerts: parsePrinterAttribute(line, "Alerts"),
+        connection: parsePrinterAttribute(line, "Connection"),
       }));
   } catch (error) {
     throw error;

src/types.ts

@@ -1,4 +1,7 @@
 export interface Printer {
   printer: string;
   description: string | null;
+  status: string | null;
+  alerts: string | null;
+  connection: string | null;
 }

src/utils/parse-printer-attribute.ts

@@ -0,0 +1,10 @@
+export default function parsePrinterAttribute(
+  stdout: string,
+  attribute: string
+): string {
+  const attributeLine = stdout
+    .split("\n")
+    .slice(1)
+    .find((line: string) => line.indexOf(attribute) !== -1);
+  return attributeLine ? attributeLine.split(":")[1].trim() : "";
+}